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Subtract 5/7 from 10/20

10/20 - 5/7 is -3/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 7 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    10/20 = 10 × 7/20 × 7 = 70/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    5/7 = 5 × 20/7 × 20 = 100/140
  4. Subtract the two fractions:
    70/140 - 100/140 = 70 - 100/140 = -30/140
  5. After reducing the fraction, the answer is -3/14

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